The windscreen washer system for my car doesn't squirt water at the front windows, only the back ones. There seem to be valves for it to, though, so I suspect it's either clogged, or something's not connected properly. I've filled the reservoir, so it's not just that it's empty. It's a little 91 Mazda 323. Any tips on how I could fix this? Is there a better community to ask such questions?